XRT72L13 Datasheet, PDF (165/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

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PRELIMINARY
M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC XRT72L13
REV. 1.0.6
Setting this bit to “0” disables this interrupt. Con-
versely, setting this bit to “1” enables this interrupt.
2.3.2.106 M12 DS2 # 4 Loopback Status Register
M12 DS2 # 1 LOOP-BACK STATUS REGISTER (ADDRESS = 0X9A)
BIT 7
R/O
0
BIT 6
BIT 5
Unused
R/O
R/O
0
0
BIT 4
/RO
0
BIT 3
BIT 2
BIT 1
BIT 0
DS1
DS1
DS1
DS1
Channel # 15 Channel # 14 Channel # 13 Channel # 12
Loopback Loopback Loopback Loopback
Status
Status
Status
Status
R/O
R/O
R/O
R/O
0
0
0
0
Bit 3 - DS1 Channel # 15 Loop-back Status
This “Read-Only” bit-field indicates whether or not a
loop-back request has been detected for DS1 Chan-
nel # 15.
This bit-field will be set to “1” if a loop-back request
has been detected for DS1 Channel # 15. Converse-
ly, this bit-field will be set to “0” if a loop-back request
has NOT been detected for DS1 Channel # 15.
NOTE: This bit-field is invalid if the XRT72L13 M13 device
is operating in the “ITU-T G.747” Mode.
Bit 2 - DS1 Channel # 14 Loop-back Status
This “Read-Only” bit-field indicates whether or not a
loop-back request has been detected for DS1 Chan-
nel # 14.
This bit-field will be set to “1” if a loop-back request
has been detected for DS1 Channel # 14. Converse-
ly, this bit-field will be set to “0” if a loop-back request
has NOT been detected for DS1 Channel # 14.
Bit 1 - DS1 Channel # 13 Loop-back Status
This “Read-Only” bit-field indicates whether or not a
loop-back request has been detected for DS1 Chan-
nel # 13.
This bit-field will be set to “1” if a loop-back request
has been detected for DS1 Channel # 13. Converse-
ly, this bit-field will be set to “0” if a loop-back request
has NOT been detected for DS1 Channel # 13.
Bit 0 - DS1 Channel # 12 Loop-back Status
This “Read-Only” bit-field indicates whether or not a
loop-back request has been detected for DS1 Chan-
nel # 12.
This bit-field will be set to “1” if a loop-back request
has been detected for DS1 Channel # 12. Converse-
ly, this bit-field will be set to “0” if a loop-back request
has NOT been detected for DS1 Channel # 12.
2.3.2.107 M12 DS2 # 5 Loopback Interrupt/Inter-
rupt Enable Register
M12 DS2 # 5 LOOP-BACK INTERRUPT/INTERRUPT ENABLE REGISTER (ADDRESS = 0X9B)
BIT 7
DS1
Channel 19
Loop-back
Request
Interrupt
Status
RUR
0
BIT 6
DS1
Channel 18
Loop-back
Request
Interrupt
Status
RUR
0
BIT 5
DS1
Channel 17
Loop-back
Request
Interrupt
Status
RUR
0
BIT 4
DS1
Channel 16
Loop-back
Request
Interrupt
Status
RUR
0
BIT 3
DS1
Channel 19
Loop-backj
Request
Interrupt
Enable
R/W
0
BIT 2
DS1
Channel 18
Loop-backj
Request
Interrupt
Enable
R/W
0
BIT 1
DS1
Channel 17
Loop-backj
Request
Interrupt
Enable
R/W/
0
BIT 0
DS1
Channel 16
Loop-backj
Request
Interrupt
Enable
R/W
0
Bit 7 - DS1 Channel 19 Loop-back Request Inter-
rupt Status
This “Reset-upon-Read” bit-field indicates whether
the “DS1 Channel 19 Loop-back Request” interrupt
has occurred or not.
This bit-field will be set to “1” if the “DS1 Channel 19
Loop-back Request Interrupt” has occurred since the
last read of this register.
This bit-field will be set to “0” if the “DS1 Channel 19
Loop-back Request” interrupt has NOT occurred
since the last read of this register.
NOTE: This bit-field is ignored if the XRT72L13 is config-
ured to operate in the “ITU-T G.747 Mode”.
Bit 6 - DS1 Channel 18 Loop-back Request Inter-
rupt Status
153